package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.mapper.DishMapper;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
public class DishServiceImpl extends ServiceImpl<DishMapper, Dish> implements DishService {

    @Autowired
    private DishFlavorService dishFlavorService;
    /**
     * 新增菜品，同时保存对应的口味数据
     * @param dishDto
     */
    @Transactional
    @Override
    public void saveWithFlavor(DishDto dishDto) {
//        保存菜品的基本信息到菜品表dish中
        this.save(dishDto);

//        菜品口味,但是前端传来的数据中只有name和value没有id，需要为每个Flavor添加id
//        id就是前面的菜品里面的id
        Long dishId = dishDto.getId();

//        获取所有口味集合
        List<DishFlavor> flavors = dishDto.getFlavors();
//        为每个Flavor添加id
        for (DishFlavor flavor : flavors) {
            flavor.setDishId(dishId);
        }
//        保存菜品口味数据到菜品口味表dish_flavor中
        dishFlavorService.saveBatch(flavors);
    }

    /**
     * 根据id查询菜品信息和对应的口味信息
     * @param id
     * @return
     */
    @Override
    public DishDto getWithFlavor(Long id) {
//        查询菜品基本信息，从dish表查询
        Dish dish = this.getById(id);

        DishDto dishDto = new DishDto();
        BeanUtils.copyProperties(dish,dishDto);

//        查询当前菜品对应的口味信息，从dish_flavor表查询
        LambdaQueryWrapper<DishFlavor> lqw=new LambdaQueryWrapper<>();
        lqw.eq(id!=null,DishFlavor::getDishId,id);
        List<DishFlavor> flavors = dishFlavorService.list(lqw);
        dishDto.setFlavors(flavors);
        return dishDto;
    }

    /**
     * 修改菜品和口味
     * @param dishDto
     */
    @Override
    public void updateWithFlavor(DishDto dishDto) {
//        更新dish表基本信息
        this.updateById(dishDto);
//        清理当前菜品对应口味数据--dish_flavor表的delete操作
        LambdaQueryWrapper<DishFlavor> lqw=new LambdaQueryWrapper<>();
        lqw.eq(dishDto.getId()!=null,DishFlavor::getDishId,dishDto.getId());

        dishFlavorService.remove(lqw);

//        添加当前提交过来的口味数据--dish_flavor表的insert操作
        List<DishFlavor> flavors = dishDto.getFlavors();
//        为每个Flavor添加id
        for (DishFlavor flavor : flavors) {
            flavor.setDishId(dishDto.getId());
        }
        dishFlavorService.saveBatch(flavors);
    }
}
